<template>

    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="btn-list">
                    <div class="btn-wrapper">
                        <div class="btn">{{this.city}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="btn-list">
                    <div class="btn-wrapper"
                        v-for="item of hotCitysList"
                        :key="item.id"
                        @click="handleCityClick(item.name)"
                    >
                        <div class="btn">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area"
                 v-for="(item, key) of citysList"
                 :key="key"
                 :ref="key"
            >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list"
                     v-for="innerItem of item"
                     :key="innerItem.id"
                     @click="handleCityClick(innerItem.name)"
                >
                    <div class="item border-bottom">{{innerItem.name}}</div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  props: {
    citysList: Object,
    hotCitysList: Array,
    letter: String
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  computed: {
    ...mapState(['city'])
  }
}
</script>

<style scoped lang='stylus'>
    .border-topbottom {
        &:before{
            border-color : #ccc
        }
        &:after {
            border-color : #ccc
        }
    }
    .border-bottom {
        &:before {
            border-color : #ccc
        }
    }
    .list {
        position : absolute
        overflow : hidden
        top : 1.59rem
        left : 0
        right : 0
        bottom : 0
        .title {
            line-height : 0.54rem
            background : #eee
            font-size : 0.26rem
            padding-left : 0.2rem
            color : #666
        }
        .btn-list {
            padding : 0.1rem 0.6rem 0.1rem 0.1rem
            overflow : hidden
            .btn-wrapper {
                float : left
                width : 33.3%
                .btn {
                    margin : 0.1rem
                    text-align : center
                    padding : 0.1rem 0
                    border-radius : 0.06rem
                    border : 0.02rem solid #ccc
                }
            }
        }
        .item-list {
            .item {
                line-height : 0.76rem
                padding-left : 0.2rem
            }
        }
    }
</style>
